Improvement in vehicle-springs



A. L. & L. A. DAVIS- Vehicle-Spring.

WITNESSES I NVENTOR 6 '7 6. 2/, 9M

' m. JITTORJVEY UnrTnn STATEs PATENT @rirron.

AMBROSE L. DAVIS AND LEVI A. DAVIS, OF BINGHAMTON, NEW YORK.

IMPROVEMENT IN VEHICLE-SPRINGS.

Specification forming part of Letters Patent No. 2 I 2,905, dated March4, 187.); application filed September 24, 1878.

To all whom it may concern:

Be it known that we, AMBROSE L. DAVIS and LEVI A. DAvIs, of the city ofBin ghamton, in the county of Broome and State of New York, haveinvented certain new and useful Improvements in Vehicle-Springs; and wedo hereby declare that the followin is a full, cl car, and exactdescription of the invention, which will enable others skilled in theart to which it appertains to make and use the same, reference being hadto the accompanying drawings, and to the letters of reference markedthereon, which form a part of this specification.

In the drawings, Figurel represents a plan view, from the top, of asection of the wagonbody, supported by the rear gear and springs, hereindescribed as our invention. Fig. 2 is a side elevation of the same,showing one spring.

Our invention is applicable either to the use of full elliptical springsor to half elliptical springs. Fig. 2 shows it in connection with fullspring, while Fig. 3 in the drawings represents a perspective view of amodification of our improvement; and Fig. I, a detached sectional viewof the spring, taken on a longitudinal line with the pivotal joint, bywhich it is secured at the middle to the body of the vehicle.

Ais the wagon-body, and B G are crossbars in the frame. D D are thesprings, (t being the upper half and b, the lower spring. E representsthe axle, to which b, the under half of spring, is secured in anysuitable manner. Spring D is connected at one end to the body orframe-work of the wagon, as shown in the drawings, to cross-bar B, andat or near the middle of the upper half, a, is connected to thecross-bar (J, or its equivalent, by means of a pivot or hinge, 00, soconstructed and so connecting the spring to the wagon-body as to al lowfree action through its entire length to the upper spring, a.

Our invention consists, chiefly, in the use of the upper semi-ellipticalspring, a, secured to the frame-work of the body both at one end and ator near the center of the spring by the pivot-hinge as, allowing thefree action of the spring, as described. Ordinarily elliptical springsare rigidly connected to the body only at the center, which connectionis necessary in order to utilize the elasticity of the sprin By theadditional connection of one of the ends of the spring to the body theaxles are more steadily held in position, and the draft is trans mitteddirectly through the spring to the axle.

Our invention is applicable to either a front or rear gear, or to bothcombined in the same vehicle. In the combination using both halves ofthe elliptical'spring D, the upper spring, a, may run directly over theunder half, I), parallel with it, and each connected at the same pointto the cross-bar B, or its equivalent, forming thereby a full ellipticalspring; or the upper spring may be at any desired angle to the undersprin Having thus described our invention, we claim- 1. In combinationwith the body of a vehicle, an elliptical spring, connected at one endto the body of the vehicle or an attachment thereof, and at the middleof its upper part by a pivotal attachment, whereby full play is given tothe spring, substantially as specified.

2. In the construction of vehicle-gears, the upper semi-ellipticalspring, a, secured at one end to the frame of the vehicle, and connectedat or near the center to cross-piece G by the free pivotal joint m,substantially as and for the purposes described.

In testimony that we claim the foregoing as our own we hereto affix oursignatures in presence of two witnesses.

AMBROSE L. DAVIS. LEVI A. DAVIS. Witnesses:

EDWARD K. CLARK, CARL Snnnwoon.

